wineps.drv: Write-strings warnings fix.

dlls/wineps.drv/ppd.c

@@ -526,7 +526,7 @@ static char *PSDRV_PPDGetWord(char *str, char **next)
  *	PSDRV_AddSlot
  *
  */
-static INT PSDRV_AddSlot(PPD *ppd, LPSTR szName, LPSTR szFullName,
+static INT PSDRV_AddSlot(PPD *ppd, LPCSTR szName, LPCSTR szFullName,
 	LPSTR szInvocationString, WORD wWinBin)
 {
     INPUTSLOT	*slot, **insert = &ppd->InputSlots;

dlls/wineps.drv/psdrv.h

@@ -173,8 +173,8 @@ typedef struct _tagCONSTRAINT {
 } CONSTRAINT;
 
 typedef struct _tagINPUTSLOT {
-    char			*Name;
-    char			*FullName;
+    const char			*Name;
+    const char			*FullName;
     char			*InvocationString;
     WORD			WinBin; /* eg DMBIN_LOWER */
     struct _tagINPUTSLOT	*next;